src/auth/userdb-prefetch.c

/* Copyright (c) 2004-2018 Dovecot authors, see the included COPYING file */

#include "auth-common.h"
#include "userdb.h"

#ifdef USERDB_PREFETCH

#include "str.h"
#include "var-expand.h"


static void prefetch_lookup(struct auth_request *auth_request,
                userdb_callback_t *callback)
{
    /* auth_request_set_field() should have already placed the userdb_*
       values to userdb_reply. */
    if (!auth_request->userdb_prefetch_set) {
        if (auth_request_get_auth(auth_request)->userdbs->next == NULL) {
            /* no other userdbs */
            if (auth_request->userdb_lookup) {
                auth_request_log_error(auth_request, AUTH_SUBSYS_DB,
                    "userdb lookup not possible with only userdb prefetch");
            } else {
                auth_request_log_error(auth_request, AUTH_SUBSYS_DB,
                    "passdb didn't return userdb entries");
            }
            callback(USERDB_RESULT_INTERNAL_FAILURE, auth_request);
            return;
        }
        if (!auth_request->userdb_lookup || auth_request->debug) {
            /* more userdbs, they may know the user */
            auth_request_log_debug(auth_request, AUTH_SUBSYS_DB,
                "passdb didn't return userdb entries, "
                "trying the next userdb");
        }
        callback(USERDB_RESULT_USER_UNKNOWN, auth_request);
        return;
    }

    auth_request_log_debug(auth_request, AUTH_SUBSYS_DB, "success");
    callback(USERDB_RESULT_OK, auth_request);
}

struct userdb_module_interface userdb_prefetch = {
    "prefetch",

    NULL,
    NULL,
    NULL,

    prefetch_lookup,

    NULL,
    NULL,
    NULL
};
#else
struct userdb_module_interface userdb_prefetch = {
    .name = "prefetch"
};
#endif